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Cosmological Limits on the Neutrino Mass from the Lya Forest

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arxiv astro-ph/9903335 v1 pith:V6BDJT6C submitted 1999-03-23 astro-ph

Rupert A.C. Croft (Harvard CfA) , Wayne Hu (IAS , Princeton) , Romeel Dave' (Princeton) This is my paper
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keywords massforestomegacosmologicallimitsmassiveneutrinoneutrinos
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The Lya forest in quasar spectra probes scales where massive neutrinos can strongly suppress the growth of mass fluctuations. Using hydrodynamic simulations with massive neutrinos, we successfully test techniques developed to measure the mass power spectrum from the forest. A recent observational measurement in conjunction with a conservative implementation of other cosmological constraints places upper limits on the neutrino mass: m_nu < 5.5 eV for all values of Omega_m, and m_nu < 2.4 (Omega_m/0.17 -1) eV, if 0.2 < Omega_m <0.5 as currently observationally favored (both 95 % C.L.).

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  1. Constraints on Neutrino Physics from DESI DR2 BAO and DR1 Full Shape

    astro-ph.CO 2025-03 conditional novelty 5.0 of 10

    DESI DR2 BAO and full-shape data plus CMB yield ∑m_ν < 0.0642 eV (95% CL) under ΛCDM, in 3σ tension with oscillation lower limits, relaxed to <0.163 eV in w0waCDM.

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